Metaphorically pleasing to taste; pleasing to the eyes or mind.
English Synonyms and Antonyms, by James Champlin Fernald
That is delicious which affords a gratification at once vivid and delicate to the senses, especially to those of taste and smell; as, delicious fruit; a delicious odor; luscious has a kindred but more fulsome meaning, inclining toward a cloying excess of sweetness or richness. Savory is applied chiefly to cooked food made palatable by spices and condiments. Delightful may be applied to the higher gratifications of sense, as delightful music, but is chiefly used for that which is mental and spiritual. Delicious has a limited use in this way; as, a delicious bit of poetry; the word is sometimes used ironically for some pleasing absurdity; as, this is delicious! Compare DELIGHTFUL.